LTspice model equivalent to UC384x series

HighTechPower · Aug 10, 2020

Hi. I want to make an offline Flyback converter simulation in LTspice. Can anybody suggest a PWM IC model that is equivalent to or as near as possible to TI UC384x series in it?

stenzer · Aug 10, 2020

Hi,

it seems a Spice Model is available for the UC3845.

BR

HighTechPower · Aug 10, 2020

stenzer said:
Hi,

it seems a Spice Model is available for the UC3845.

BR

Bro I could not find. Under what name is it there?

stenzer · Aug 10, 2020

Hi,

Component: https://www.ti.com/product/UC3845?keyMatch=UC3845&tisearch=Search-EN-everything&usecase=GPN
Model: https://www.ti.com/lit/zip/slum533

By having a look on the spice file it looks the model is for the UCC38C45. Nevertheless, it is seems to be a pretty close match to the UC3845.

BR

FvM · Aug 10, 2020

You also find UC3845 model at LTspice forum https://groups.io/g/LTspice

sabu31 · Aug 12, 2020

Hi ,

The LT 1242, 1244 are similar to 3842 and 3844 series.

zenerbjt · Aug 15, 2020

LT124X and UC384X are yes, pin 4 pin compatible.
The UC384X draws a bit more bias current.

Intrerestingly, the UC384X datasheet says it needs a schottky connected from gate drive output to ground...but the lt124x does not say this.

LTspice model equivalent to UC384x series

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LTspice model equivalent to UC384x series

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